Compilare: user.cpp: In function ‘void sorth(std::vector<int>&)’: user.cpp:31:9: warning: unused variable ‘i’ [-Wunused-variable] int i, l, r, m, heap_size = V.size(); ^ user.cpp:31:12: warning: unused variable ‘l’ [-Wunused-variable] int i, l, r, m, heap_size = V.size(); ^ user.cpp:31:15: warning: unused variable ‘r’ [-Wunused-variable] int i, l, r, m, heap_size = V.size(); ^ user.cpp:31:18: warning: unused variable ‘m’ [-Wunused-variable] int i, l, r, m, heap_size = V.size(); ^